<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>角色管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片 -->
    <el-card>
      <!-- 添加角色 -->
      <el-row>
        <el-col>
          <el-button type="primary" >添加角色</el-button>
        </el-col>
      </el-row>
      <el-table :data="rolesList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['dbbottom', i1 === 0 ? 'dbtop' : '','cventer']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightsById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级权限 -->
              <el-col :span="19">
                <el-row :class="[i2 === 0 ? '' : 'dbtop','cventer']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag closable type="success" @close="removeRightsById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                      <el-tag closable type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" @close="removeRightsById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>

            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作"  width="300">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"  @click="showEditDialog(scope.row.id)">编辑</el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeUserById(scope.row.id)">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightsDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限 -->
    <el-dialog title="分配权限"  :visible.sync="setRightsDialogVisible" width="50%" @close="setRightsDialogClose">
      <el-tree ref="treeRef" :data="rightsList" show-checkbox node-key="id" default-expand-all
               :default-checked-keys="defKeys"
               :props="treeProps">
      </el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightsDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
    export default {
       data() {
         return {
           rolesList: [],
           setRightsDialogVisible: false,
           rightsList: [],
           treeProps: {
             children: 'children',
             label: 'authName'
           },
           defKeys: [],
           roleId: ''// 当前即将分配权限id
         }
       },
      created() {
         this.getRolesList();
      },
      methods: {
        async getRolesList() {
          const {data: res} = await this.$http.get('roles');
          if (res.meta.status !== 200) return this.$message.error({message: '获取角色列表失败！'});
          console.log(res);
          this.rolesList = res.data
        },
        async removeRightsById(role, rightsId) {
          const confirmResult = await this.$confirm('此操作将永久删除该用户权限, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).catch(err => err);
          // 确定返回字符串 confirm ，取消返回字符串 cancel
          if (confirmResult === 'cancel') {
            return this.$message.info('已经取消删除！');
          }

          const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightsId}`)
          if (res.meta.status !== 200) return this.$message.error({message: '删除权限失败！'});
          this.$message.success({message: '删除权限成功！'});
          role.children = res.data
        },
        async showSetRightsDialog(role) {
          this.roleId = role.id;
          const {data: res} = await this.$http.get('rights/tree');
          if (res.meta.status !== 200) return this.$message.error({message: '获取角色权限失败！'});
          this.rightsList = res.data;
          console.log(this.rightsList);
          // 递归获取三级权限Id
          this.getLeafKeys(role, this.defKeys);
          this.setRightsDialogVisible = true
        },
        // 递归形式获取角色三级权限
        getLeafKeys(node, arr) {
          // 如果当前节点不包含children 属性则是三级节点
          if (!node.children) {
            return arr.push(node.id)
          }
          node.children.forEach(item => {
            this.getLeafKeys(item, arr)
          })
        },
        setRightsDialogClose() {
          this.defKeys = []
        },
        async allotRights() {
          const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
          ];
          const idSrt = keys.join(',');
          const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idSrt});
          if (res.meta.status !== 200) return this.$message.error({message: '分配角色权限失败！'});
          this.$message.success({message: '分配角色权限成功！'});
          this.getRolesList();
          this.setRightsDialogVisible = false
        }
      }
    }
</script>

<style lang="less" scoped>
  .el-tag{
    margin: 7px;
  }
  .dbtop{
    border-top: 1px solid #eee;
  }
  .dbbottom{
    border-bottom: 1px solid #eee;
  }
  .cventer{
    display: flex;
    align-items: center;
  }

</style>
